Participle

Present

croissant

Past

crûcruecruscruesétant crue

Infinitive

Present

croître

Past

être crue

Gerund

Present

en croissant

Past

en étant crue

Rule

Accroître, décroître and recroître do not take a circumflex accent for terminations which are not followed with t. Croître has a circumflex accent everywhere it could have a confusion with croire. Particularity for croître past participle is to have a circumflex accent only for the masculine: crû, crue, crus et crues. Since 1990, it has been recommended to keep its circumflex accent in all inflexions including past participle.